On the site, north of Prasat Nakhon Luang, stands a pavilion on a mound, housing an unfinished Dharma Chakra, or “Wheel of the Law”, an early representation of the Buddha’s teaching. People carved Wheels of the Law, or Doctrine, long before the first image of the Buddha. This unfinished wheel, resembling the moon, is said to have floated to this area along the Pa Sak River, hence the name Pra Jan Loi, or Floating Moon. The stone was initially kept at Wat Theppa Jan and, in 1899 CE, moved to Prasat Nakhon Luang, where it was enshrined in a special hall. [8]
During the reign of King Chulalongkorn (1873-1910 CE), a new structure was built on the foundations of the old sanctuary. The Western-style building contains four footprints of the Buddha carved in stone, each about two and a half metres wide and five and a half metres long. Prasat Nakhon Luang was registered as an ancient monument by the Fine Arts Department and published in the Royal Gazette, Volume 52, Issue 75, dated 8 March 1935 (B.E. 2478). [9]
The Fine Arts Department has excavated, restored, and repaired the site since 1981, completing the work in 1994 CE. Kasikorn Bank provided partial support for the project.
Prasat Nakhon Luang is at geographical coordinates: 14° 27' 55.40" N, 100° 36' 41.23" E.